Air Source Heat Pumps (ASHP)
An Air Source Heat Pumps (ASHP) operates by transferring heat between the outside air and the indoor space using the principles of refrigeration. ASHP’s consists of several key components including an outdoor unit (with a fan, evaporator coil, and compressor) and an indoor unit (typically containing a heat exchanger, air handler, and sometimes a buffer tanks or hot water cylinders)
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Key Components of an Air Source Heat Pumps (ASHP)
How the System Work
- Outdoor Unit: Contains a fan and heat exchanger that absorbs heat from the air.
- Compressor: Increases the temperature of the absorbed heat using refrigerant.
- Heat Exchanger (Indoors): Transfers heat from the refrigerant to your home’s heating system.
- Expansion Valve: Regulates refrigerant flow and pressure within the system.
- Refrigerant: Circulates through the system to absorb and release heat efficiently.
- Controls & Thermostat: Allow you to manage heating and cooling settings easily.
- Heat Absorption: The outdoor unit draws in ambient air and extracts low-grade heat using refrigerant
- Compression: The compressor increases the temperature of the refrigerant.
- Heat Transfer: Heated refrigerant flows to the indoor unit where it transfers warmth to the air or water system.
- Distribution: Warm air or hot water is distributed throughout your home via radiators, underfloor heating, or air ducts.
- Cooling Option (Reversible Units): In warmer months, the process reverses, removing heat from inside your building and releasing it •outdoors—just like an air conditioner.